DAQlinkIII
seismicsurvey3

 

This High Resolution Distributed Seismograph DAQlink III is the combination of a standard DAQlink III with an “expansion bubble”.  This expansion bubble houses a high-speed networking subsystem for passing trigger signals and seismic data between units.  The entire system is connected to a computer controls the seismograph and stores the acquired seismic data. The distributed system can be interconnected through conventional geophone-style cables, or high-speed network-style cables, or else conventional Wi-Fi transceivers.  Plus, all Distributed DAQlink III units can be utilized as standard seismographs if the need should arise.

 Electrical
 A/D  24 bit sigma delta converter
 Anti-Alias Filters  85% of Nyquist frequency
 Low Cut Filter  User Selectable – DC, 0.1 Hz, 2 Hz
 Filter Type  User Selectable – Linear, Minimum Phase
 Sample Rates  1/16, 1/8, 1/4, 1/2, 1, 2, 4, 8, 16ms
 PreAmp Gain  x2 (6 dB) &x32 (30 dB) standard x1 (0 dB) & x16 (24 dB) optional
 Max Input at x2 (Standard)  3.58 Volts P-P x2 (Standard)7.16 Volts P-P x1 (Optional)
 Bandwidth  DC to 15 kHz
 Power  Less than 0.8 watts per channel
 Input Impedance 100k Ohms
 Clock  Sync  GPS
 Performance
 Trigger Accuracy  ± 1 µs at all sample rates
 Dynamic Range  Better than 118 dB (at 2 ms)
 % THD  0.0012 %
 Crosstalk  Better than -125 dB
 CMRR  Better than 100 dB
 Noise Floor 13.0” x 9.0” x 4.8” / (330 x 230 x 120 mm)
 Physical
 Number Channels  24
 Temperature  -40°C to +85°C
 Humidity  0 to 100%
 Size  13.0” x 9.0” x 4.8” / (330 x 230 x 120 mm)
 Weight  15 lbs (6.8 kg)
 Data Storage (Internal 16GB CF)  120 hours (24 channels @ 2ms)
 Data Storage (by Ethernet) Unlimited
 Data Format  32-bit float IEEE SEG-Y/SEG-D
 LEDs  Network Connect, Network Data, Status and Battery
 GPS Clock  Synchronizes and adjusts internal clock oscillator.  Uses internal oscillator when GPS signal is lost
 Clock Accuracy  Time Stamp and clock accurate to less than 1 microsecond with GPS
Voltage Calibration All channels calibrated for precisevoltage readings. Allows accurate measurement of particle velocity for Vibration and Blast monitoring
Connectors
RJ-45 Standard CAT-5 Ethernet
GPS 4-pin Weatherproof
Trigger 3-pin Weatherproof
Power 2-pin Weatherproof
Auxiliary Port 19-pin Weatherproof
Seismic Data 51-pin male Weatherproof
Up Network Port 10-pin male Weatherproof
Down N/W Port 10-pin female Weatherproof

 

Field Benefits

Built in Test Function

Cutting-Edge Technology for Data Quality

*     Ultra High-Speed 24bit ADC (48,000 samples/sec)

*     High Resolution Clock

*     Low Noise & Low Distortion Means Better Data

Designed to Produce & Protect Data

*     Data Always Stored in Box – No Lost Data

*     Offload Data While Recording – No Lost Production

*     Better Data Handling for Superior Production

Versatile Operation

*     Continuous Recording

*     Trigger on Time, Data Event or Trigger Input

*     Different Modes for Different Types of Projects

Sturdy Aluminum Construction

*     Rugged, Lightweight, “O” Ring Sealed to IP 67

*     Threaded Holes for Mounting

*     For Permanent Mounting, or Long-Term Deployment

Downhole Recording

*     24 Channel Units Ideal for Shallow Holes with
8 three-Component Geophone Sondes

*     Use Wi-Fi network to collect data from multiple wells

Earth Monitoring

*     Low Power for Long-Term Use

*     Use Cellular Modem for Remote Data Collection

Useful for Every Project

*     Engineering Seismic

*     Oil & Gas Exploration

*     MicroSeismicFrac Monitoring

*     Strong Motion Detection and Monitoring

Network Details

Network Connection Options

Geophone String Wire – 2.5 Mbps US / 14.92 Mbps DS @ 2 Km

Network Cabling –8.34 Mbps US / 6.07 Mbps DS @ 2 Km

Wi-Fi – 54 Mbps @ 1 Km (w/ clear line of sight)

Time Break – Trigger Options

Hardwire Trigger – Trigger through wire to nearest DAQlink and transfer trigger signal through cable.

Radio Trigger – Trigger across radio to Distributed DAQlink and transfer trigger signal through cable

Trigger Storage – With DAQlinks continuously recording, store trigger times at Source Point and Post-Process Shot Records

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